Function014

A five digit positive integer ( less than 32767 ) is entered through the keyboard write a function to calculate sum of digits of the five digit number by using recursive function.

#include <stdio.h>
#include <conio.h>
int rsum ( int );                                                /* Function Prototype Declaration */
void main ( )
{         
        int        rs;
        int        n;
        clrscr ( );
                                 
        printf("\n\n\t\t Enter a number...:"); scanf("%d", &n);
                                    
        rs = rsum ( n );                                      /* Function calling */
        printf("\n\n\t\t Sum of Digits...: %d", rs);
        getch ( );
}                  
                        
int rsum ( int    num )                                    /* Function Definition */
{            
        int      sum = 0, rem;
                      
        if ( num != 0 )
        {                                     
                    rem = num % 10;
                    sum = rem + rsum ( num / 10 );
        }
        return sum;
}

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